81 UMa
81 UMa
81 UMa is a A-type (White) star located in the constellation Ursa Major. It carries the designation 81 UMa.
Located approximately 298.7 light-years from Earth, 81 UMa resides within the broader disk of our Milky Way galaxy.
81 UMa is classified as a spectral class A star (A-type (White)) on the Harvard spectral classification system.
With an apparent magnitude of +5.60, 81 UMa sits near the limit of naked-eye visibility. It can be glimpsed without optical aid under dark skies, but binoculars will make observation much easier. Observers will note its blue hue, which corresponds to a B-V color index of -0.014.
Физические свойства
| Спектральный класс | Class A — A-type (White) |
| Показатель цвета (B−V) | -0,014 |
Наблюдение
| Видимая звёздная величина | +5.60 |
| Абсолютная звёздная величина | 0,79 |
| Расстояние | 299 ly |
| Созвездие | Ursa Major |
Положение
| Прямое восхождение | 13h 34,12m |
| Склонение | 55° 20,91′ |
Часто задаваемые вопросы
What type of star is 81 UMa?
81 UMa is a Class A — A-type (White) star.
How far is 81 UMa from Earth?
81 UMa is approximately 298.7 light-years from Earth.
Can you see 81 UMa with the naked eye?
With an apparent magnitude of 5.60, 81 UMa is visible to the naked eye.
What constellation is 81 UMa in?
81 UMa is located in the constellation Ursa Major.